/*******************************************************************************
 *     ___                  _   ____  ____
 *    / _ \ _   _  ___  ___| |_|  _ \| __ )
 *   | | | | | | |/ _ \/ __| __| | | |  _ \
 *   | |_| | |_| |  __/\__ \ |_| |_| | |_) |
 *    \__\_\\__,_|\___||___/\__|____/|____/
 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2024 QuestDB
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

package io.questdb.griffin.engine.functions.test;

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.ColumnType;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.PlanSink;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.TimestampFunction;
import io.questdb.griffin.engine.functions.UnaryFunction;
import io.questdb.std.IntList;
import io.questdb.std.ObjList;

import java.util.concurrent.atomic.AtomicLong;

public class TestTimestampCounterFactory implements FunctionFactory {
    public static final AtomicLong COUNTER = new AtomicLong();
    private static final String NAME = "test_timestamp_counter";

    @Override
    public String getSignature() {
        return NAME + "(N)";
    }

    @Override
    public Function newInstance(
            int position,
            ObjList<Function> args,
            IntList argPositions,
            CairoConfiguration configuration,
            SqlExecutionContext sqlExecutionContext
    ) {
        final Function tsFunc = args.getQuick(0);
        if (configuration.isDevModeEnabled()) {
            return new Func(tsFunc, ColumnType.getTimestampType(tsFunc.getType()));
        }
        return tsFunc;
    }

    private static class Func extends TimestampFunction implements UnaryFunction {
        private final Function tsFunc;

        private Func(Function tsFunc, int timestampType) {
            super(timestampType);
            this.tsFunc = tsFunc;
        }

        @Override
        public Function getArg() {
            return tsFunc;
        }

        @Override
        public long getTimestamp(Record rec) {
            COUNTER.incrementAndGet();
            return tsFunc.getTimestamp(rec);
        }

        @Override
        public boolean isThreadSafe() {
            return true;
        }

        @Override
        public void toPlan(PlanSink sink) {
            sink.val(NAME);
        }
    }
}
